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Date: Mon, 15 Jul 2013 22:27:19 +0800
From: Peng Tao <bergwolf@...il.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: linux-kernel@...r.kernel.org, Peng Tao <tao.peng@....com>,
Andreas Dilger <andreas.dilger@...el.com>
Subject: [PATCH-v3 16/17] staging/lustre/llite: readdir convert to iterate
From: Peng Tao <tao.peng@....com>
Signed-off-by: Peng Tao <tao.peng@....com>
Signed-off-by: Andreas Dilger <andreas.dilger@...el.com>
---
drivers/staging/lustre/lustre/llite/dir.c | 45 +++++++++-----------
.../staging/lustre/lustre/llite/llite_internal.h | 4 +-
drivers/staging/lustre/lustre/llite/llite_nfs.c | 13 +++---
3 files changed, 28 insertions(+), 34 deletions(-)
diff --git a/drivers/staging/lustre/lustre/llite/dir.c b/drivers/staging/lustre/lustre/llite/dir.c
index e2afb97..1084999 100644
--- a/drivers/staging/lustre/lustre/llite/dir.c
+++ b/drivers/staging/lustre/lustre/llite/dir.c
@@ -483,12 +483,11 @@ fail:
goto out_unlock;
}
-int ll_dir_read(struct inode *inode, __u64 *_pos, void *cookie,
- filldir_t filldir)
+int ll_dir_read(struct inode *inode, struct dir_context *ctx)
{
struct ll_inode_info *info = ll_i2info(inode);
struct ll_sb_info *sbi = ll_i2sbi(inode);
- __u64 pos = *_pos;
+ __u64 pos = ctx->pos;
int api32 = ll_need_32bit_api(sbi);
int hash64 = sbi->ll_flags & LL_SBI_64BIT_HASH;
struct page *page;
@@ -548,12 +547,14 @@ int ll_dir_read(struct inode *inode, __u64 *_pos, void *cookie,
fid_le_to_cpu(&fid, &ent->lde_fid);
ino = cl_fid_build_ino(&fid, api32);
type = ll_dirent_type_get(ent);
+ ctx->pos = lhash;
/* For 'll_nfs_get_name_filldir()', it will try
* to access the 'ent' through its 'lde_name',
- * so the parameter 'name' for 'filldir()' must
- * be part of the 'ent'. */
- done = filldir(cookie, ent->lde_name, namelen,
- lhash, ino, type);
+ * so the parameter 'name' for 'ctx->actor()'
+ * must be part of the 'ent'.
+ */
+ done = !dir_emit(ctx, ent->lde_name,
+ namelen, ino, type);
}
next = le64_to_cpu(dp->ldp_hash_end);
if (!done) {
@@ -594,50 +595,44 @@ int ll_dir_read(struct inode *inode, __u64 *_pos, void *cookie,
}
}
- *_pos = pos;
+ ctx->pos = pos;
ll_dir_chain_fini(&chain);
RETURN(rc);
}
-static int ll_readdir(struct file *filp, void *cookie, filldir_t filldir)
+static int ll_readdir(struct file *filp, struct dir_context *ctx)
{
struct inode *inode = filp->f_dentry->d_inode;
struct ll_file_data *lfd = LUSTRE_FPRIVATE(filp);
struct ll_sb_info *sbi = ll_i2sbi(inode);
- __u64 pos = lfd->lfd_pos;
int hash64 = sbi->ll_flags & LL_SBI_64BIT_HASH;
int api32 = ll_need_32bit_api(sbi);
int rc;
- struct path path;
ENTRY;
CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p) pos %lu/%llu "
" 32bit_api %d\n", inode->i_ino, inode->i_generation,
- inode, (unsigned long)pos, i_size_read(inode), api32);
+ inode, (unsigned long)lfd->lfd_pos, i_size_read(inode), api32);
- if (pos == MDS_DIR_END_OFF)
+ if (lfd->lfd_pos == MDS_DIR_END_OFF)
/*
* end-of-file.
*/
GOTO(out, rc = 0);
- rc = ll_dir_read(inode, &pos, cookie, filldir);
- lfd->lfd_pos = pos;
- if (pos == MDS_DIR_END_OFF) {
+ ctx->pos = lfd->lfd_pos;
+ rc = ll_dir_read(inode, ctx);
+ lfd->lfd_pos = ctx->pos;
+ if (ctx->pos == MDS_DIR_END_OFF) {
if (api32)
- filp->f_pos = LL_DIR_END_OFF_32BIT;
+ ctx->pos = LL_DIR_END_OFF_32BIT;
else
- filp->f_pos = LL_DIR_END_OFF;
+ ctx->pos = LL_DIR_END_OFF;
} else {
if (api32 && hash64)
- filp->f_pos = pos >> 32;
- else
- filp->f_pos = pos;
+ ctx->pos >>= 32;
}
filp->f_version = inode->i_version;
- path.mnt = filp->f_path.mnt;
- path.dentry = filp->f_dentry;
- touch_atime(&path);
out:
if (!rc)
@@ -1976,7 +1971,7 @@ struct file_operations ll_dir_operations = {
.open = ll_dir_open,
.release = ll_dir_release,
.read = generic_read_dir,
- .readdir = ll_readdir,
+ .iterate = ll_readdir,
.unlocked_ioctl = ll_dir_ioctl,
.fsync = ll_fsync,
};
diff --git a/drivers/staging/lustre/lustre/llite/llite_internal.h b/drivers/staging/lustre/lustre/llite/llite_internal.h
index cbcd118..0534665 100644
--- a/drivers/staging/lustre/lustre/llite/llite_internal.h
+++ b/drivers/staging/lustre/lustre/llite/llite_internal.h
@@ -90,6 +90,7 @@ extern struct file_operations ll_pgcache_seq_fops;
#define REMOTE_PERM_HASHSIZE 16
struct ll_getname_data {
+ struct dir_context ctx;
char *lgd_name; /* points to a buffer with NAME_MAX+1 size */
struct lu_fid lgd_fid; /* target fid we are looking for */
int lgd_found; /* inode matched? */
@@ -679,8 +680,7 @@ extern struct file_operations ll_dir_operations;
extern struct inode_operations ll_dir_inode_operations;
struct page *ll_get_dir_page(struct inode *dir, __u64 hash,
struct ll_dir_chain *chain);
-int ll_dir_read(struct inode *inode, __u64 *_pos, void *cookie,
- filldir_t filldir);
+int ll_dir_read(struct inode *inode, struct dir_context *ctx);
int ll_get_mdt_idx(struct inode *inode);
/* llite/namei.c */
diff --git a/drivers/staging/lustre/lustre/llite/llite_nfs.c b/drivers/staging/lustre/lustre/llite/llite_nfs.c
index 28cc41e..f142a1e 100644
--- a/drivers/staging/lustre/lustre/llite/llite_nfs.c
+++ b/drivers/staging/lustre/lustre/llite/llite_nfs.c
@@ -214,9 +214,12 @@ static int ll_get_name(struct dentry *dentry, char *name,
struct dentry *child)
{
struct inode *dir = dentry->d_inode;
- struct ll_getname_data lgd;
- __u64 offset = 0;
int rc;
+ struct ll_getname_data lgd = {
+ .lgd_name = name,
+ .lgd_fid = ll_i2info(child->d_inode)->lli_fid,
+ .ctx.actor = ll_nfs_get_name_filldir,
+ };
ENTRY;
if (!dir || !S_ISDIR(dir->i_mode))
@@ -225,12 +228,8 @@ static int ll_get_name(struct dentry *dentry, char *name,
if (!dir->i_fop)
GOTO(out, rc = -EINVAL);
- lgd.lgd_name = name;
- lgd.lgd_fid = ll_i2info(child->d_inode)->lli_fid;
- lgd.lgd_found = 0;
-
mutex_lock(&dir->i_mutex);
- rc = ll_dir_read(dir, &offset, &lgd, ll_nfs_get_name_filldir);
+ rc = ll_dir_read(dir, &lgd.ctx);
mutex_unlock(&dir->i_mutex);
if (!rc && !lgd.lgd_found)
rc = -ENOENT;
--
1.7.9.5
--
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